Don't use $(RM) in src/doc/Makefile.in We allow these rules to be used in an unconfigured tree, and some makes do not supply a value for RM by default. https://github.com/krb5/krb5/commit/3f7394c1440f7526bc6f008f841b438d84411f3d Author: Ben Kaduk Commit: 3f7394c1440f7526bc6f008f841b438d84411f3d Branch: master src/doc/Makefile.in | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)